[X] My Assistant

[Bjorn Jonsson]

I decided to create a special thread for this topic. Previously information on IMG2PNG was scattered across various threads here.

I new version of IMG2PNG is now available. For those that don't know, this is a command line uitility that can convert various PDS formatted files to PNGs (8 or 16 bits per pixel depending on the input files).

This utility should work for lots of different PDS files, e.g. MER, Pathfinder, Voyager, Galileo, Cassini, Stardust, various Mars orbiters, Mariner 9/10 (!), Viking Orbiter, Viking Lander, Magellan, Clementine, Messenger, New Horizons etc.

The major new feature in the new version is the ability to convert FITS files.

IMG2PNG can be downloaded by visiting http://www.mmedia.is/bjj/utils/img2png

Any information on possible bugs welcome.

[Bjorn Jonsson]

I just uploaded a new version of IMG2PNG. This version is important for those of you that use it to calibrate Cassini images as I corrected a nasty bug that resulted in incorrect brightness of the images. For example, this manifested itself in blue images that became too dark relative to the red and green ones. This messed up RGB composites.

There are no changes that affect images from other spacecraft.

As before this can be downloaded at http://www.mmedia.is/bjj/utils/img2png

[knight]

I just uploaded a new version of IMG2PNG. This version is important for those of you that use it to calibrate Cassini images as I corrected a nasty bug that resulted in incorrect brightness of the images. For example, this manifested itself in blue images that became too dark relative to the red and green ones. This messed up RGB composites.

There are no changes that affect images from other spacecraft.

As before this can be downloaded at http://www.mmedia.is/bjj/utils/img2png

Hi there I am pretty new to this so excuse me if this is a bad observation.
I've noticed that the img2png only works with one of the IMG files I downloaded from the Mars DEM site at HiRise. with further investigation the only difference I found was that the Min and Max values for all the other (non working) IMG files were :
VALID_MINIMUM = -1954.39
VALID_MAXIMUM = -1833.56
in the negative range. and always resulted in a black .png file. (got this info from a pds2jpg converter I found which makes the 8 bit conversion.

The only IMG file that converted successfully had a positive min and max value :
VALID_MINIMUM = 782.07
VALID_MAXIMUM = 1300.01
I've tried using the -s option to multiply by a negatice number or the -ctcal_dep.txt to set up a file with the correct ranges but I get nothing.
my cal_dep.txt file is just :
-1954 -1800
(as I understood it it should only have one entry per file)

if I am getting any of this wrong I appologise and would appreciate any guidance in converting these files.

my aim is to convert the files into hieghtmaps and eventually to 3d models in a standard 3d format.

Cheers.
~a